High-speed tool-steel.



UNITED STA TES PATENT DFFICE.

REINHOLD BECKER, or cement, GERMANY.

' HIGH-SPEED TOOL-STEEL.

"No Drawing.

Z '0 all whom it may concern."

lie it known that-I, REINHOLD BECKER, a subject of the German Emperor, residing at Crefeld, Germany, I have, invented certain new and usefulImproved High-Speed Tol- Steel, of which the following is a specifies tion.

This invention relates to the production of a high speed tool steel which shall be.

easier to forge and of much, greater efficiency I than the best high speed. tool steels hitherto 1 known,

It has already'been proposedto produce high speed tool-steel from alloys of steel,

tungstemand chromium, with or without either or both of the. metals vanadium and molybdenum." t e According to the present invention the improved high speed tool steel consists of an alloy. of stock chromium,tungsten, and c0. bal't, preferably up to per. cent. of cobalt being employed with onwithout either of the metals vanadium and molybdenum.

Alloys of steel, chromium, cobalt and tungsten, or of steel, chromium, cobalt, tungsten and either vanadium or molybdenum have been found particularly suitable for the production of a high speed toolsteel which is capable of being more easily worked and Specification of Letters Patent.

' Application filed December a, 1912.

Serial No. 734,796. i

is of greater efficiency than the high speed tool steels hitherto known.

In the manufacture of iron and steel it is notnew per se to employ small quantities of cobalt, but hitherto it has only been proposed to employ cobalt in the production of weldable steel containing a high percentage of carbon. It'is believed to be new, how- Jm'ium', tungsten, and .upto 15 percent. of vcobalt.

'In testimony whereof affix my signature in presence of two witnesses.

REINHOLDBECKER. Witnessesi l i HERMAN GLIscHTER,

MINNA RrrzEL.

Patented Dec.,9, 1913. 

